[RPP] Exclude extensions from Duplicated JavaScript insight

Bug: 394373632
Change-Id: I5de1420c7a5294f3c95e767971b57d8d1ae9bc9f
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6393951
Reviewed-by: Jack Franklin <[email protected]>
Commit-Queue: Jack Franklin <[email protected]>
Auto-Submit: Connor Clark <[email protected]>

Author: Connor Clark

front_end/models/trace/insights/DuplicatedJavaScript.ts

@@ -66,6 +66,10 @@ export function generateInsight(
       return false;
     }
 
+    if (script.url?.startsWith('chrome-extension://')) {
+      return false;
+    }
+
     return Helpers.Timing.timestampIsInBounds(context.bounds, script.ts);
   });